As a preface to the pharmacokinetic analysis of cocaine in pregnant and lactating rats (using oral administration of drug), young Long-Evans rats were used to compare the relative concentrations of… (More)

Human brains were removed at autopsy and examined grossly and histologically for any abnormality or evidence of disease. Sixty-two brains appearing normal by these criteria were examined further.… (More)

Three-month-old male C57BL/10 mice were exercised by voluntary running activity in vertically revolving wheels for two hours each day until 24 months of age. Activity scores were recorded each day… (More)